Pith Number

pith:H227Y6I5

pith:2018:H227Y6I5FWOT7JKCZMVN2TZP2R

not attested not anchored not stored refs pending

Topological negative refraction of surface acoustic waves in a Weyl phononic crystal

Chunyin Qiu, Fan Zhang, Hailong He, Liping Ye, Manzhu Ke, Xiangxi Cai, Xiying Fan, Zhengyou Liu

arxiv:1808.04647 v1 · 2018-08-14 · cond-mat.mtrl-sci

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{H227Y6I5FWOT7JKCZMVN2TZP2R}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T00:06:37.019978Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3eb5fc791d2d9d3fa542cb2add4f2fd44735fe45157686d33ab91cbdc8793448

Aliases

arxiv: 1808.04647 · arxiv_version: 1808.04647v1 · doi: 10.48550/arxiv.1808.04647 · pith_short_12: H227Y6I5FWOT · pith_short_16: H227Y6I5FWOT7JKC · pith_short_8: H227Y6I5

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/H227Y6I5FWOT7JKCZMVN2TZP2R \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 3eb5fc791d2d9d3fa542cb2add4f2fd44735fe45157686d33ab91cbdc8793448

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ec2ed3186f5b8e403c64f5014d0149236aa5109b2e85f2880f12142cc7daa8ec",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2018-08-14T11:58:48Z",
    "title_canon_sha256": "c531aca8f285a8265ca3f7bf706b411ed819c78cf5bffb90b9fb2da8dc7f52bf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.04647",
    "kind": "arxiv",
    "version": 1
  }
}